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Title: Amine-facilitated up-hill transport of plutonium(IV) cations across an immobilized liquid membrane
Authors: Shukla, J P
Sonawane, J V
Kumar, Anil
Singh, R K
Issue Date: May-1996
Publisher: NISCAIR-CSIR, India
Abstract: The diffusion-limited and amine-facilitated plutonium (IV) ion permeation from nitric acid media across an immobilized liquid membrane (ILM) has been investigated to quantify the membrane carrier type effects on its transport. Amberlite LA-2 (Amb LA-2), Trilaurylamine (TLA) and Aliquat-336 (Ali- 336) have been tested as the carriers as typical examples of secondary, tertiary and quaternary amines, respectively. After suitable dilutions, the receptors have been immobilized on a microporous polymeric support and are held within the pores by capillary forces. Both the  composition' of the organic membrane solvents and type of amine carrier have a marked effect on plutonium permeation. Recovery of Pu steadily increases from secondary to quaternary amines and its permeability across ILM follows the order: quaternary > tertiary> secondary. More than 95% pertraction of Pu(IV) is easily accomplished using tertiary or quaternary amine as ionophore across ILM in single run employing a feed solution containing about 5 mg/L Pu in 4 M nitric acid solution while the receiving phase was 0.1 M NH2OH.HCI prepared in 0.3 M HNO3 On the other hand, plutonium permeation is found to plummet to about 49% on employing secondary amine, Amb LA-2, as the carrier.
Page(s): 145-148
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.03(3) [May 1996]

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